{"id":"CVE-2021-47306","state":"PUBLISHED","title":"net: fddi: fix UAF in fza_probe","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fddi: fix UAF in fza_probe\n\nfp is netdev private data and it cannot be\nused after free_netdev() call. Using fp after free_netdev()\ncan cause UAF bug. Fix it by moving free_netdev() after error message.\n\nTURBOchannel adapter\")","publishedAt":"2024-05-21T14:35:26.005Z","updatedAt":"2026-05-11T13:51:56.371Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"04b06716838bfc26742dbed3ae1d3697fe5317ee","versionType":"git"},{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"f33605908a9b6063525e9f68e62d739948c5fccf","versionType":"git"},{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"bdfbb51f7a437ae8ea91317a5c133ec13adf3c47","versionType":"git"},{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"deb7178eb940e2c5caca1b1db084a69b2e59b4c9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/fddi/defza.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.135","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.53","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.13.5","status":"unaffected","lessThanOrEqual":"5.13.*","versionType":"semver"},{"version":"5.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/fddi/defza.c"]}],"references":["https://git.kernel.org/stable/c/04b06716838bfc26742dbed3ae1d3697fe5317ee","https://git.kernel.org/stable/c/f33605908a9b6063525e9f68e62d739948c5fccf","https://git.kernel.org/stable/c/bdfbb51f7a437ae8ea91317a5c133ec13adf3c47","https://git.kernel.org/stable/c/deb7178eb940e2c5caca1b1db084a69b2e59b4c9"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47306.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47306","state":"PUBLISHED","datePublished":"2024-05-21T14:35:26.005Z","dateUpdated":"2026-05-11T13:51:56.371Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T13:27:52.133Z"},"containers":{"cna":{"title":"net: fddi: fix UAF in fza_probe","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fddi: fix UAF in fza_probe\n\nfp is netdev private data and it cannot be\nused after free_netdev() call. Using fp after free_netdev()\ncan cause UAF bug. Fix it by moving free_netdev() after error message.\n\nTURBOchannel adapter\")"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"04b06716838bfc26742dbed3ae1d3697fe5317ee","versionType":"git"},{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"f33605908a9b6063525e9f68e62d739948c5fccf","versionType":"git"},{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"bdfbb51f7a437ae8ea91317a5c133ec13adf3c47","versionType":"git"},{"version":"61414f5ec9834df8aa4f55c90de16b71a3d6ca8d","status":"affected","lessThan":"deb7178eb940e2c5caca1b1db084a69b2e59b4c9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/fddi/defza.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.20","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.135","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.53","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.13.5","status":"unaffected","lessThanOrEqual":"5.13.*","versionType":"semver"},{"version":"5.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/fddi/defza.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/04b06716838bfc26742dbed3ae1d3697fe5317ee"},{"url":"https://git.kernel.org/stable/c/f33605908a9b6063525e9f68e62d739948c5fccf"},{"url":"https://git.kernel.org/stable/c/bdfbb51f7a437ae8ea91317a5c133ec13adf3c47"},{"url":"https://git.kernel.org/stable/c/deb7178eb940e2c5caca1b1db084a69b2e59b4c9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:51:56.371Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.135"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.10.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.13.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47306","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-05-28T15:52:18.778665Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-06-04T17:14:18.861Z"}},{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/04b06716838bfc26742dbed3ae1d3697fe5317ee","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f33605908a9b6063525e9f68e62d739948c5fccf","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/bdfbb51f7a437ae8ea91317a5c133ec13adf3c47","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/deb7178eb940e2c5caca1b1db084a69b2e59b4c9","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:32:08.444Z"}}]}}}